AUSTRALIAN Amateur Radio Station
VK4ADC rotating GIF
Email me via the Feedback Form
Callsign : VK4ADC
Location : Brisbane, Australia
Locator code : QG62mj
Please note : Emails are only checked periodically so don't expect an immediate response....
This web site is designed for viewing on a 1024x768 (or higher) resolution display
and accessed via a broadband connection.

IMPORTANT NOTE : All pages/images on this web site are copyright.
Contact me via the Feedback Form for permission to reproduce any original items/details/images published on this site. Links to these pages are fine, copying is not...
Home
GoogleSearch VK4ADC.COM
Site Feedback Form
Background
VK4ADC Log Searches
VKLogger
(handy link)
MUF page
Radio Propagation References
Web Links
Technical
/Construction
References:
HF Antennas : Squid Pole Mounting for Field Days Trap dipole for WARC bands & Diamond W-8010 antenna Field Day Antenna Ideas HF Helical Whip Calculator (for Windows) Tuning coax traps Trap-style Inverted-V for 10 to 80 metres
Info : ICOM 720A Rx Preamp IC-720A handbook pages 27MHz CB to 50MHz conversion Producing PCBs using positive resist board Toroidal Baluns Coaxial Cable Comparisons dBm to uV and dBuV lookup table
VHF Marine frequencies
Wire Gauges with resistance values for copper conductors Copper Wire Sizes and Data CB Channels
Radio quiet notebook computers
SPECIAL ITEM : Caveat Emptor warning about Ebay Seller "radio-mart" of Kentucky, USA.
VHF/UHF+ Projects : 1296MHz / 23cm Transverter
VHF PLL Synthesiser project
432MHz/ 70cm Transverter
Motorola MHW1815 / 1915 power amp mods for 1296
Software : GridLocW Lat/Long to Maidenhead converter for Windows
Using VKCL Software with multiple Icom Transceivers on a common CIV bus.
Operating:
VK VHF/UHF Field Day Reports : Summer 2009 2010 Winter 2009 2010 Spring 2009 & Field Day Ideas
John Moyle Field Day Report : 2009 2010

 

----------------------------------------------------------------------------------------------------------
Be notified of
page updates
it's private
powered by
ChangeDetection

----------------------------------------------------------------------------------------------------------

 

Click on the pictures and follow the links  for greater detail or supporting texts ! 
PROPAGATION REFERENCES
   

 

VKLOGGER.COM
VK Logger dot com

 

       

This is an Australian-based propagation spotting/logger facility with separate "forums" for HF, 50MHz (6m) and VHF/UHF (2m, 70cm, 23cm etc). Ideally suited for use by VK, ZL and near Pacific amateur operators interested in operations on 50MHz and above.

Used for contact coordination for weak signal modes eg meteor scatter (MS), tropo scatter, Earth-Moon-earth (EME), sporadic E (Es) , Trans Equatoral Propagation (TEP), etc for CW, voice, PSK, WSJT ( FSK441, JT65 modes)

Operated by Adam VK4CP.

http://www.vklogger.com

 

NEAR-REAL-TIME MUF PAGE


I take no credit for the MUF info available from this link but I do use it to see what is happening. If you haven't been using it maybe you should..


The main site is located at http://www.spacew.com/www/realtime.html for details on interpretation etc..

 

General Propagation info

 

       

The solar cycle, sunspot activity and indexes, greyline maps, pictures of the sun etc can all be found on a single web page : http://dx.qsl.net/propagation/index.html

Solar Cycle predictions from the NOAA Space Weather Prediction Centre: http://www.swpc.noaa.gov/SolarCycle/ :

WWW 50MHz /
6 Metre propagation sources

 

       

http://dxworld.com/50prop.html and also watch the DX Summit cluster

       


( link : http://www.dxsummit.fi/CustomFilter.aspx?customCount=50&customRange=50 ) either direct or via Dx Monitor software. That is where the current propagation info is to be had.

 

HF -> VHF/UHF propagation maps from DX spots DX Sherlock 1.8 - V-UHF QSO real time maps

 

http://www.vhfdx.net/spots/map.php?Lan=E&Frec=50&Map=W2

Example image :

 

 

INTERESTED IN HF & VHF PROPAGATION ?

Current Space conditions per IPS :

IPS : T Index Map
This image shows the DIFFERENCE between current OBSERVED HOURLY conditions and PREDICTED MONTHLY conditions for the Australian region. The colours blue, green, yellow, red, correspond to "enhanced", "normal", "mildly depressed" and "depressed" conditions respectively. Depressions and enhancements are with respect to the IPS predicted monthly T index for that month.
Link to : Latest IPS T Index map for Australia

http://www.ips.gov.au/Solar/1/3

Latest Australia 'F2' map :


HAP charts are designed for communications between a specified base and mobile within a nominated area.

The HAP chart is a guide to frequency selection for HF communications between mobiles and a specified base station, in this case Brisbane. The recommended frequency for communications with the base at a given hour is read off from the point in the map corresponding to the mobile's location.The predictions are made from real time data which are updated each hour.

'dash lines' - If present, these delineate areas of unlikely communication. Poor communication areas which can result from one or more of the following conditions:
- the Absorption Limiting Frequency (ALF) is higher than the Optimum Working Frequency (OWF).
- the ALF exceeds the highest frequency in the user's frequency set.
- there is no suitable frequency from the user's set that is between the OWF and ALF.

 

IPS values of expected sunspot counts during Cycle 24

Latest A and K indices charts for Australia  
including history for the previous month  :

The real-time ionospheric total electron content data below updates every 60 minutes so you will need to press your browser's Refresh function occasionally to ensure that you have the latest image.....

IPS World Total Electron Content Map

 

This near real-time ionospheric total electron content (TEC) world map is produced at IPS by using the IRI-90 ionospheric model with real-time foF2 data obtained from the region. You can compare this derived product with the NASA JPL Global TEC Map. Note that the IPS dervied map may lag the NASA JPL map by an hour and is centred on a different longitude.

 

 

 

Any feedback would be appreciated : Feedback Form

Last edit : 25-Mar-2010